修改教师端我的授课记录查询和导出

src/views/course/Mylecnotes.vue

@@ -190,10 +190,13 @@ export default {
       //   link.click();
       //   document.body.removeChild(link);
       // })
-      let teacherId = this.userInfo.sysId;
-      window.open(
-        `/manageApi/admin/export/exportInTeacherRecord?teacherId=${teacherId}`
-      );
+      // 取pageData记录第一条
+      if (this.pageData.length > 0) {
+        let teacherId = this.pageData[0].teacherId;
+        window.open(
+          `/manageApi/admin/export/exportInTeacherRecord?teacherId=${teacherId}`
+        );
+      }
     },
 
     // 导出课程下的学员信息